(a) How do climatic conditions affect economic activities in Bolivia? (b) Why does Chile find good markets for its agricultural produce in the United States?

Convert each rectangular equation to polar form. $x + y = 1$

What is the average value of f(x)=1/x on the interval [1, p] for p$\gt$1? What is the average value of f as $p \rightarrow \infty$?

Determine all significant features by hand and sketch a graph. $f(x)=x^{2}|x|$

Consider the plot of log $\gamma_{2}$ against $l^{1/2}$ with B = 1.50 and C = 0 in the Davies equation as a representation of experimental data for a certain MX electrolyte. Over what range of ionic strengths does the application of the Debye-Huckel limiting law lead to an error in the value of the activity coefficient of less than 10 per cent of the value predicted by the extended law?

Does a major league baseball team’s record during spring training indicate how the team will play during the regular season? Over the last six years, the correlation coefficient between a team’s winning percentage in spring training and its winning percentage in the regular season is .18 (The Wall Street Journal, March 30, 2009). Shown are the winning percentages for the 14 American League teams during the 2008 season.

$$\begin{matrix} \text{Team} & \text{Spring Training } & \text{Regular Season} & \text{Team} & \text{Spring Training } & \text{Regular Season}\\ \hline\\ \text{Baltimore Orioles} & \text{0.407} & \text{0.422} & \text{Minnesota Twins} & \text{0.5} & \text{0.54}\\ \text{Boston Red Sox} & \text{0.429} & \text{0.586} & \text{New York Yankees} & \text{0.577} & \text{0.549}\\ \text{Chicago White Sox} & \text{0.417} & \text{0.546} & \text{Oakland A’s} & \text{0.692} & \text{0.466}\\ \text{Cleveland Indians} & \text{0.569} & \text{0.5} & \text{Seattle Mariners} & \text{0.5} & \text{0.377}\\ \text{Detroit Tigers} & \text{0.569} & \text{0.457} & \text{Tampa Bay Rays} & \text{0.731} & \text{0.599}\\ \text{Kansas City Royals} & \text{0.533} & \text{0.463} & \text{Texas Rangers} & \text{0.643} & \text{0.488}\\ \text{Los Angeles Angels} & \text{0.724} & \text{0.617} & \text{Toronto Blue Jays} & \text{0.448} & \text{0.531}\\ \end{matrix}$$

a. What is the correlation coefficient between the spring training and the regular season winning percentages? b. What is your conclusion about a team’s record during spring training indicating how the team will play during the regular season? What are some of the reasons why this occurs? Discuss.

Determine the quadrant in which the point (x,y) lies. x < 0 and y > 0

What fraction of the Moon’s visible face is illuminated during first quarter phase? Why is this phase called first quarter?

What was the role of trade in Olmec civilization?

A teacher can select two students, one from each of two different groups, in 121 ways. The two groups have the same number of students. How many are in each group?

Solve the following equations for x. a. 4x-6y=20, b.

$$\frac { 1 } { 2 } ( x - 6 ) = 9$$

, c.

$$\frac { 4 } { 5 } + \frac { 18 } { x } = 8$$

, d. 2+|2x-3|=5

Let

$$f ( x , y ) = x y ^ { 2 }$$

and

$$\mathbf { r } ( t ) = \left\langle \frac { 1 } { 2 } t ^ { 2 } , t ^ { 3 } \right\rangle.$$

Use the Chain Rule for Paths to evaluate

$$\frac { d } { d t } f ( \mathbf { r } ( t ) )$$

at t = 1 and t = -1.

Positrons cannot penetrate matter more than a few atomic diameters, but positron emission of radiotracers can be monitored in medical diagnosis. Explain.

Solve the given problems using inequalities. (All data are accurate to at least two significant digits).

Under what conditions is $|a+b|<|a|+|b| ?$